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Adobe InDesign and Transparent Images on Color Backgrounds

Mar 30, 2009 • general

When you insert a transparent image over a color background in Adobe InDesign, the transparent image may look good when you generate the PDF, but when you actually print the image from a laser printer, the transparent image has a faint background where the image should otherwise be transparent.

I spent a long time trying to figure out the solution to this problem. It seemed to be a new, unheard of issue by everyone I asked. But after a post to an InDesign forum, I found the answer.

InDesign Secrets calls it "Yucky Discolored Box Syndrome." Here's their solution:

Create a Transparency Flattener Preset that completely rasterizes everything:

  1. Edit > Transparency Flattener Presets, click on "High" as a starting point, and then click "New."
  2. In the ensuing dialog box, yank the raster/vector slider all the way to the left. Set the linework resolution to the printer's res (say, 600), and set the gradient/mesh resolution to, oh, 150. (I think you'll find shadow appearance satisfactory at 150. If not, go to 300.) Save as a new Flattener Preset.

  3. File > Print, and under Output, choose Composite CMYK, and CHECK the "Simulate Overprint" checkbox. Under Advanced, select your all-raster flattener.

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About Tom Johnson

Tom Johnson

I'm a technical writer based in the California San Francisco Bay area. Topics I write about on this blog include technical writing, authoring and publishing tools, API documentation, tech comm trends, visual communication, technical writing career advice, information architecture and findability, developer documentation, and more. If you're a professional or aspiring technical writer, be sure to subscribe to email updates using the form above. You can learn more about me here.